3 // TinyGetText - A small flexible gettext() replacement
4 // Copyright (C) 2004 Ingo Ruhnke <grumbel@gmx.de>
6 // This program is free software; you can redistribute it and/or
7 // modify it under the terms of the GNU General Public License
8 // as published by the Free Software Foundation; either version 2
9 // of the License, or (at your option) any later version.
11 // This program is distributed in the hope that it will be useful,
12 // but WITHOUT ANY WARRANTY; without even the implied warranty of
13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 // GNU General Public License for more details.
16 // You should have received a copy of the GNU General Public License
17 // along with this program; if not, write to the Free Software
18 // Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
21 #include <sys/types.h>
28 #include "tinygettext.h"
30 //#define TRANSLATION_DEBUG
32 namespace TinyGetText {
34 /** Convert \a which is in \a from_charset to \a to_charset and return it */
35 std::string convert(const std::string& text,
36 const std::string& from_charset,
37 const std::string& to_charset)
39 if (from_charset == to_charset)
42 iconv_t cd = iconv_open(to_charset.c_str(), from_charset.c_str());
44 size_t in_len = text.length();
45 size_t out_len = text.length()*3; // FIXME: cross fingers that this is enough
47 char* out_orig = new char[out_len];
48 char* in_orig = new char[in_len+1];
49 strcpy(in_orig, text.c_str());
53 size_t out_len_temp = out_len; // iconv is counting down the bytes it has
54 // written from this...
56 size_t retval = iconv(cd, &in, &in_len, &out, &out_len_temp);
57 out_len -= out_len_temp; // see above
58 if (retval == (size_t) -1)
60 std::cerr << strerror(errno) << std::endl;
61 std::cerr << "Error: conversion from " << from_charset
62 << " to " << to_charset << " went wrong: " << retval << std::endl;
67 std::string ret(out_orig, out_len);
73 bool has_suffix(const std::string& lhs, const std::string rhs)
75 if (lhs.length() < rhs.length())
78 return lhs.compare(lhs.length() - rhs.length(), rhs.length(), rhs) == 0;
81 bool has_prefix(const std::string& lhs, const std::string rhs)
83 if (lhs.length() < rhs.length())
86 return lhs.compare(0, rhs.length(), rhs) == 0;
89 int plural1(int ) { return 0; }
90 int plural2_1(int n) { return (n != 1); }
91 int plural2_2(int n) { return (n > 1); }
92 int plural3_lv(int n) { return (n%10==1 && n%100!=11 ? 0 : n != 0 ? 1 : 2); }
93 int plural3_ga(int n) { return n==1 ? 0 : n==2 ? 1 : 2; }
94 int plural3_lt(int n) { return (n%10==1 && n%100!=11 ? 0 : n%10>=2 && (n%100<10 || n%100>=20) ? 1 : 2); }
95 int plural3_1(int n) { return (n%10==1 && n%100!=11 ? 0 : n%10>=2 && n%10<=4 && (n%100<10 || n%100>=20) ? 1 : 2); }
96 int plural3_sk(int n) { return (n==1) ? 0 : (n>=2 && n<=4) ? 1 : 2; }
97 int plural3_pl(int n) { return (n==1 ? 0 : n%10>=2 && n%10<=4 && (n%100<10 || n%100>=20) ? 1 : 2); }
98 int plural3_sl(int n) { return (n%100==1 ? 0 : n%100==2 ? 1 : n%100==3 || n%100==4 ? 2 : 3); }
100 /** Language Definitions */
102 LanguageDef lang_hu("hu", "Hungarian", 1, plural1); // "nplurals=1; plural=0;"
103 LanguageDef lang_ja("ja", "Japanese", 1, plural1); // "nplurals=1; plural=0;"
104 LanguageDef lang_ko("ko", "Korean", 1, plural1); // "nplurals=1; plural=0;"
105 LanguageDef lang_tr("tr", "Turkish", 1, plural1); // "nplurals=1; plural=0;"
106 LanguageDef lang_da("da", "Danish", 2, plural2_1); // "nplurals=2; plural=(n != 1);"
107 LanguageDef lang_nl("nl", "Dutch", 2, plural2_1); // "nplurals=2; plural=(n != 1);"
108 LanguageDef lang_en("en", "English", 2, plural2_1); // "nplurals=2; plural=(n != 1);"
109 LanguageDef lang_fo("fo", "Faroese", 2, plural2_1); // "nplurals=2; plural=(n != 1);"
110 LanguageDef lang_de("de", "German", 2, plural2_1); // "nplurals=2; plural=(n != 1);"
111 LanguageDef lang_nb("nb", "Norwegian Bokmal", 2, plural2_1); // "nplurals=2; plural=(n != 1);"
112 LanguageDef lang_no("no", "Norwegian", 2, plural2_1); // "nplurals=2; plural=(n != 1);"
113 LanguageDef lang_nn("nn", "Norwegian Nynorsk", 2, plural2_1); // "nplurals=2; plural=(n != 1);"
114 LanguageDef lang_sv("sv", "Swedish", 2, plural2_1); // "nplurals=2; plural=(n != 1);"
115 LanguageDef lang_et("et", "Estonian", 2, plural2_1); // "nplurals=2; plural=(n != 1);"
116 LanguageDef lang_fi("fi", "Finnish", 2, plural2_1); // "nplurals=2; plural=(n != 1);"
117 LanguageDef lang_el("el", "Greek", 2, plural2_1); // "nplurals=2; plural=(n != 1);"
118 LanguageDef lang_he("he", "Hebrew", 2, plural2_1); // "nplurals=2; plural=(n != 1);"
119 LanguageDef lang_it("it", "Italian", 2, plural2_1); // "nplurals=2; plural=(n != 1);"
120 LanguageDef lang_pt("pt", "Portuguese", 2, plural2_1); // "nplurals=2; plural=(n != 1);"
121 LanguageDef lang_es("es", "Spanish", 2, plural2_1); // "nplurals=2; plural=(n != 1);"
122 LanguageDef lang_eo("eo", "Esperanto", 2, plural2_1); // "nplurals=2; plural=(n != 1);"
123 LanguageDef lang_fr("fr", "French", 2, plural2_2); // "nplurals=2; plural=(n > 1);"
124 LanguageDef lang_pt_BR("pt_BR", "Brazilian", 2, plural2_2); // "nplurals=2; plural=(n > 1);"
125 LanguageDef lang_lv("lv", "Latvian", 3, plural3_lv); // "nplurals=3; plural=(n%10==1 && n%100!=11 ? 0 : n != 0 ? 1 : 2);"
126 LanguageDef lang_ga("ga", "Irish", 3, plural3_ga); // "nplurals=3; plural=n==1 ? 0 : n==2 ? 1 : 2;"
127 LanguageDef lang_lt("lt", "Lithuanian", 3, plural3_lt); // "nplurals=3; plural=(n%10==1 && n%100!=11 ? 0 : n%10>=2 && (n%100<10 || n%100>=20) ? 1 : 2);"
128 LanguageDef lang_hr("hr", "Croatian", 3, plural3_1); // "nplurals=3; plural=(n%10==1 && n%100!=11 ? 0 : n%10>=2 && n%10<=4 && (n%100<10 || n%100>=20) ? 1 : 2);"
129 LanguageDef lang_cs("cs", "Czech", 3, plural3_1); // "nplurals=3; plural=(n%10==1 && n%100!=11 ? 0 : n%10>=2 && n%10<=4 && (n%100<10 || n%100>=20) ? 1 : 2);"
130 LanguageDef lang_ru("ru", "Russian", 3, plural3_1); // "nplurals=3; plural=(n%10==1 && n%100!=11 ? 0 : n%10>=2 && n%10<=4 && (n%100<10 || n%100>=20) ? 1 : 2);"
131 LanguageDef lang_uk("uk", "Ukrainian", 3, plural3_1); // "nplurals=3; plural=(n%10==1 && n%100!=11 ? 0 : n%10>=2 && n%10<=4 && (n%100<10 || n%100>=20) ? 1 : 2);"
132 LanguageDef lang_sk("sk", "Slovak", 3, plural3_sk); // "nplurals=3; plural=(n==1) ? 0 : (n>=2 && n<=4) ? 1 : 2;"
133 LanguageDef lang_pl("pl", "Polish", 3, plural3_pl); // "nplurals=3; plural=(n==1 ? 0 : n%10>=2 && n%10<=4 && (n%100<10 || n%100>=20) ? 1 : 2);
134 LanguageDef lang_sl("sl", "Slovenian", 3, plural3_sl); // "nplurals=4; plural=(n%100==1 ? 0 : n%100==2 ? 1 : n%100==3 || n%100==4 ? 2 : 3);"
138 get_language_def(const std::string& name)
140 if (name == "hu") return lang_hu;
141 else if (name == "ja") return lang_ja;
142 else if (name == "ko") return lang_ko;
143 else if (name == "tr") return lang_tr;
144 else if (name == "da") return lang_da;
145 else if (name == "nl") return lang_nl;
146 else if (name == "en") return lang_en;
147 else if (name == "fo") return lang_fo;
148 else if (name == "de") return lang_de;
149 else if (name == "nb") return lang_nb;
150 else if (name == "no") return lang_no;
151 else if (name == "nn") return lang_nn;
152 else if (name == "sv") return lang_sv;
153 else if (name == "et") return lang_et;
154 else if (name == "fi") return lang_fi;
155 else if (name == "el") return lang_el;
156 else if (name == "he") return lang_he;
157 else if (name == "it") return lang_it;
158 else if (name == "pt") return lang_pt;
159 else if (name == "es") return lang_es;
160 else if (name == "eo") return lang_eo;
161 else if (name == "fr") return lang_fr;
162 else if (name == "pt_BR") return lang_pt_BR;
163 else if (name == "lv") return lang_lv;
164 else if (name == "ga") return lang_ga;
165 else if (name == "lt") return lang_lt;
166 else if (name == "hr") return lang_hr;
167 else if (name == "cs") return lang_cs;
168 else if (name == "ru") return lang_ru;
169 else if (name == "uk") return lang_uk;
170 else if (name == "sk") return lang_sk;
171 else if (name == "pl") return lang_pl;
172 else if (name == "sl") return lang_sl;
176 DictionaryManager::DictionaryManager()
177 : current_dict(&empty_dict)
179 parseLocaleAliases();
180 // setup language from environment vars
181 const char* lang = getenv("LC_ALL");
183 lang = getenv("LC_MESSAGES");
185 lang = getenv("LANG");
192 DictionaryManager::parseLocaleAliases()
194 // try to parse language alias list
195 std::ifstream in("/usr/share/locale/locale.alias");
198 while(in.good() && !in.eof()) {
199 while(isspace(c) && !in.eof())
202 if(c == '#') { // skip comments
203 while(c != '\n' && !in.eof())
209 while(!isspace(c) && !in.eof()) {
213 while(isspace(c) && !in.eof())
215 std::string language;
216 while(!isspace(c) && !in.eof()) {
223 set_language_alias(alias, language);
228 DictionaryManager::get_dictionary(const std::string& spec)
230 std::string lang = get_language_from_spec(spec);
231 Dictionaries::iterator i = dictionaries.find(get_language_from_spec(lang));
232 if (i != dictionaries.end())
236 else // Dictionary for languages lang isn't loaded, so we load it
238 //std::cout << "get_dictionary: " << lang << std::endl;
239 Dictionary& dict = dictionaries[lang];
241 dict.set_language(get_language_def(lang));
243 dict.set_charset(charset);
245 for (SearchPath::iterator p = search_path.begin(); p != search_path.end(); ++p)
247 DIR* dir = opendir(p->c_str());
250 std::cerr << "Error: opendir() failed on " << *p << std::endl;
255 while((ent = readdir(dir)))
257 if (std::string(ent->d_name) == lang + ".po")
259 std::string pofile = *p + "/" + ent->d_name;
260 std::ifstream in(pofile.c_str());
263 std::cerr << "Error: Failure file opening: " << pofile << std::endl;
267 read_po_file(dict, in);
279 std::set<std::string>
280 DictionaryManager::get_languages()
282 std::set<std::string> languages;
284 for (SearchPath::iterator p = search_path.begin(); p != search_path.end(); ++p)
286 DIR* dir = opendir(p->c_str());
289 std::cerr << "Error: opendir() failed on " << *p << std::endl;
294 while((ent = readdir(dir)))
296 if (has_suffix(ent->d_name, ".po"))
298 std::string filename = ent->d_name;
299 languages.insert(filename.substr(0, filename.length()-3));
309 DictionaryManager::set_language(const std::string& lang)
311 language = get_language_from_spec(lang);
312 current_dict = & (get_dictionary(language));
316 DictionaryManager::set_charset(const std::string& charset)
318 dictionaries.clear(); // changing charset invalidates cache
319 this->charset = charset;
320 set_language(language);
324 DictionaryManager::set_language_alias(const std::string& alias,
325 const std::string& language)
327 language_aliases.insert(std::make_pair(alias, language));
331 DictionaryManager::get_language_from_spec(const std::string& spec)
333 std::string lang = spec;
334 Aliases::iterator i = language_aliases.find(lang);
335 if(i != language_aliases.end()) {
339 std::string::size_type s = lang.find_first_of("_.");
340 if(s == std::string::npos)
343 return std::string(lang, 0, s);
347 DictionaryManager::add_directory(const std::string& pathname)
349 dictionaries.clear(); // adding directories invalidates cache
350 search_path.push_back(pathname);
351 set_language(language);
354 //---------------------------------------------------------------------------
356 Dictionary::Dictionary(const LanguageDef& language_, const std::string& charset_)
357 : language(language_), charset(charset_)
361 Dictionary::Dictionary()
367 Dictionary::get_charset() const
373 Dictionary::set_charset(const std::string& charset_)
379 Dictionary::set_language(const LanguageDef& lang)
385 Dictionary::translate(const std::string& msgid, const std::string& msgid2, int num)
387 PluralEntries::iterator i = plural_entries.find(msgid);
388 std::map<int, std::string>& msgstrs = i->second;
390 if (i != plural_entries.end() && !msgstrs.empty())
392 int g = language.plural(num);
393 std::map<int, std::string>::iterator j = msgstrs.find(g);
394 if (j != msgstrs.end())
400 // Return the first translation, in case we can't translate the specific number
401 return msgstrs.begin()->second;
406 #ifdef TRANSLATION_DEBUG
407 std::cerr << "Warning: Couldn't translate: " << msgid << std::endl;
408 std::cerr << "Candidates: " << std::endl;
409 for (PluralEntries::iterator i = plural_entries.begin(); i != plural_entries.end(); ++i)
410 std::cout << "'" << i->first << "'" << std::endl;
413 if (plural2_1(num)) // default to english rules
421 Dictionary::translate(const std::string& msgid)
423 Entries::iterator i = entries.find(msgid);
424 if (i != entries.end() && !i->second.empty())
430 #ifdef TRANSLATION_DBEUG
431 std::cout << "Error: Couldn't translate: " << msgid << std::endl;
438 Dictionary::add_translation(const std::string& msgid, const std::string& ,
439 const std::map<int, std::string>& msgstrs)
441 // Do we need msgid2 for anything? its after all supplied to the
442 // translate call, so we just throw it away
443 plural_entries[msgid] = msgstrs;
447 Dictionary::add_translation(const std::string& msgid, const std::string& msgstr)
449 entries[msgid] = msgstr;
463 std::string from_charset;
464 std::string to_charset;
466 std::string current_msgid;
467 std::string current_msgid_plural;
468 std::map<int, std::string> msgstr_plural;
472 enum { WANT_MSGID, WANT_MSGSTR, WANT_MSGSTR_PLURAL, WANT_MSGID_PLURAL } state;
475 POFileReader(std::istream& in, Dictionary& dict_)
483 void parse_header(const std::string& header)
485 // Seperate the header in lines
486 typedef std::vector<std::string> Lines;
489 std::string::size_type start = 0;
490 for(std::string::size_type i = 0; i < header.length(); ++i)
492 if (header[i] == '\n')
494 lines.push_back(header.substr(start, i - start));
499 for(Lines::iterator i = lines.begin(); i != lines.end(); ++i)
501 if (has_prefix(*i, "Content-Type: text/plain; charset=")) {
502 from_charset = i->substr(strlen("Content-Type: text/plain; charset="));
506 if (from_charset.empty() || from_charset == "CHARSET")
508 std::cerr << "Error: Charset not specified for .po, fallback to ISO-8859-1" << std::endl;
509 from_charset = "ISO-8859-1";
512 to_charset = dict.get_charset();
513 if (to_charset.empty())
514 { // No charset requested from the dict, so we use the one from the .po
515 to_charset = from_charset;
516 dict.set_charset(from_charset);
520 void add_token(const Token& token)
525 if (token.keyword == "msgid")
527 current_msgid = token.content;
528 state = WANT_MSGID_PLURAL;
530 else if (token.keyword.empty())
532 //std::cerr << "Got EOF, everything looks ok." << std::endl;
536 std::cerr << "tinygettext: expected 'msgid' keyword, got " << token.keyword
537 << " at line " << line_num << std::endl;
541 case WANT_MSGID_PLURAL:
542 if (token.keyword == "msgid_plural")
544 current_msgid_plural = token.content;
545 state = WANT_MSGSTR_PLURAL;
555 if (token.keyword == "msgstr")
557 if (current_msgid == "")
558 { // .po Header is hidden in the msgid with the empty string
559 parse_header(token.content);
563 dict.add_translation(current_msgid, convert(token.content, from_charset, to_charset));
569 std::cerr << "tinygettext: expected 'msgstr' keyword, got " << token.keyword
570 << " at line " << line_num << std::endl;
574 case WANT_MSGSTR_PLURAL:
575 if (has_prefix(token.keyword, "msgstr["))
578 if (sscanf(token.keyword.c_str(), "msgstr[%d]", &num) != 1)
580 std::cerr << "Error: Couldn't parse: " << token.keyword << std::endl;
584 msgstr_plural[num] = convert(token.content, from_charset, to_charset);
589 dict.add_translation(current_msgid, current_msgid_plural, msgstr_plural);
598 inline int getchar(std::istream& in)
606 void tokenize_po(std::istream& in)
608 enum State { READ_KEYWORD,
610 READ_CONTENT_IN_STRING,
613 State state = READ_KEYWORD;
617 while((c = getchar(in)) != EOF)
619 //std::cout << "Lexing char: " << char(c) << " " << state << std::endl;
625 state = SKIP_COMMENT;
634 } while((c = getchar(in)) != EOF && !isspace(c));
637 state = READ_CONTENT;
642 while((c = getchar(in)) != EOF)
645 // Found start of content
646 state = READ_CONTENT_IN_STRING;
648 } else if (isspace(c)) {
650 } else { // Read something that may be a keyword
652 state = READ_KEYWORD;
659 case READ_CONTENT_IN_STRING:
664 if (c == 'n') token.content += '\n';
665 else if (c == 't') token.content += '\t';
666 else if (c == 'r') token.content += '\r';
667 else if (c == '"') token.content += '"';
670 std::cout << "Unhandled escape character: " << char(c) << std::endl;
675 std::cout << "Unterminated string" << std::endl;
677 } else if (c == '"') { // Content string is terminated
678 state = READ_CONTENT;
686 state = READ_KEYWORD;
694 void read_po_file(Dictionary& dict_, std::istream& in)
696 POFileReader reader(in, dict_);
699 } // namespace TinyGetText